30th Anniversary of the Voyager 1 Flyby of Jupiter |
30th Anniversary of the Voyager 1 Flyby of Jupiter |
Mar 5 2009, 08:20 PM
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Today marks the 30th anniversary of Voyager 1's flyby of Jupiter. On March 5, 1979, Voyager 1 flew through the Jupiter system providing a wealth of information of Jupiter, its magnetic field, and moons. Thanks to Voyager 1, the Galilean satellites became worlds with real geology and amazing vistas. Voyager 1 also revealed Jupiter's ring system and Io's volcanism for the first time.
I've written up a longer post about the encounter with Io on my blog, which also has an animation of the flyby: http://gishbar.blogspot.com/2009/03/30th-a...1-flyby-of.html -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Mar 21 2010, 05:40 PM
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Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
I am thinking the color Voyager pictures must have an additional complication over those shot on subsequent missions with solid state imaging devices.
With the vidicon technology they had in the seventies, the actual size of the pixels across the image varies slightly with brightness (due to complex technical reasons in how the electron beam pics off the accumulated charges) and for an object that was noticeably colorful, each filtered picture in the mosaic would have, in addition to varying pixel size from the images being taken at slightly different distances, and pixels slightly askew due to object rotation and motion and the spacecraft flight path diverging from a straight line during imaging, pixels of different size across each image itself. That this can all be allowed for in the processing is amazing, especially in regards to maintaining the very fine detail in each image as we so often see here at UMSF. It would seem that each pixel in the final product might have had some influence from up to 9 pixels in the raw data. If there is a quick and digestible short version of how the image processing can do this (that Callisto pic is truly amazing!!) I think it would be interesting to know. Have any cameras been flown that do some/all of this processing as the images are taken, or is this something the compression software sometimes used does in the course of doing what it does ? |
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